Means for interchanging rotors in turbines



March 28, 1961 A. J. BUCHl MEANS FOR INTERCHANGING ROTORS IN TURBINES Filed March 9, 1959 2 Sheets-Sheet 1 B7 WJAJM-A LXML" I. BUCHI INVENToR March 28, 1961 um- 2,977,088

MEANS FOR INTERCHANGING ROTORS IN TURBINES Filed March 9, 1959 2 Sheets-Sheet 2 AW"! I BUCHI INVENTOR s wMgMLgqr/Q United rates Patent 6 MEANS FOR INTERCHANGING RGTORS IN TURBINES Alfred J. Buchi, Archstrasse 2, Winterthur, Switzerland Filed Mar. 9, 1959, Ser. No. 798,111

1 Claim. (Cl. 253-39) This application is a continuation-in-part of my application Serial No. 563,774 filed February 6, 1956, now abandoned, entitled Device for Fixing Guide Blades in Fluid-Flow Machines.

This invention relates to turbines and has for its object to facilitate manufacture of the inlet casing of the turbine.

Another object of the invention is to enable rotors of different sizes to be interchangeably fitted to the casing.

According to this invention in a turbine having a casing, at least one ring of stator blades, at least one set of rotor blades and an operating-fluid inlet thereto and outlet therefrom there is provided a detachable ring-like element forming one wall of the chamber in which the bladed rotor operates, means for detachably securing the described by way of example only, with reference to the accompanying drawings wherein: a

Figure 1 is a cross-sectional view of a portion of a turbine, and

Figure 2 is a partial frontelevation of a detail showing the ring supporting the guide blades.

The reference A designates the inletcasing of a radialflow, exhaust-gas turbine, and the reference B generally designates the ring of guide or stator blades provided in accordance with the present invention. The reference C designates the rotor of the turbine and the reference D designates the exhaust pipe. The guide blades 1 are perpendicular to the radially disposed wall surface 2a of the ring 2 and they are in contact with the wall E of either the casing of a compressor which is driven by the turbine or of a cooled intermediate casing.

The ring B of guide blades is fixed to a ring-like element B. The ring B. forms one of the walls of the chamber in which the bladed rotor operates and is detachably secured to the ring B by means of studs'7'. It is also secured to casing A by bolts 12. This arrangement facilitates the manufacture of the inlet casing. In addition the same inlet casing can be employed for rotors of different dimensions since difierent sizes of ring-like element B may be used within the casing in order to enable larger or smaller rotors to be mounted.

The guide blades have cylindrical projections lb which are rotatably mounted in locating holes 2b in the ring 2. The guide blades are adjusted to a predetermined angle in relation to the circumference of the ring as shown in Figure 2. When the adjustment has been made, the end of the cylindrical projection is permanently secured by welding to the ring 2 if the blade is to be finally fixed to the ring at this angle of inclination. The temporary and permanent fixing of the blades to the ring 2 is more fully described in my application Serial No. 563,774, filed February 6, 1956.

With the construction shown the ring B for the guide blades may be used with the various ring-like elements B' that may be interchanged in order to accommodat rotors of various sizes.

It is thought that the invention and its advantages will be understood from the foregoing description and it is apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing its material advantages, the form hereinbefore described and illustrated in the drawings being merely a preferred embodiment thereof.

I claim: 1

In a radial hot gas turbine the combination of a rotor provided with driving blades on the front side thereof having free edges, a casing in which said rotor is housed comprising an inlet and an outlet of the driving medium and duct means providing'at least one passage via which driving gas is conducted from a source outside the casing into an annular chamber for the rotor, said annular chamber being disposed between a ring-like front closure member and a back closure member of said casing, the front closure member defining the outlet side of the rotor on the side of the free edges of the blading, a stationary guide vane ring in said annular chamber radially outside of the rotor guiding the driving gas into the rotor blading, means for detachably securing said guide vane ring to said front closure member, and means for detachably securing said front closurev member, to the casing part enclosing said duct means, whereby provision is made for access to the rotor-and said guide vane ring.

References Cited in the file of this patent FOREIGN PATENTS Great Britain Dec. 24, 1930 

